I have two other templates. This template is taking imports from another template and I can share them if need be. I am working on a project with a tight deadline and I am trying to get this done. Any suggestions or feedback would be great

Im getting this error and I am honestly not sure why. Can anyone help me with this?

The other 2 templates. One is a Transit Gateway, The Other has VPCS, Internet Gateway, some routes to IG, Subnets and Route Tables. I will share those templates if is needed.

Here is the code with the routes and a few Transit Gateway Routes for the Transit Gateway Attachments.

Any questions please ask

{
“AWSTemplateFormatVersion”: “2010-09-09”,
“Description”: “Template for a startup company looking to move their services to the cloud”,
“Parameters”: {
“TransitGatewayRouteCIDR”: {
“Type”: “String”,
“Description”: “Route for Transit Gateway”,
“Default”: “192.168.7.0/24”
},
“TransitGatewayRouteCIDR2”: {
“Type”: “String”,
“Description”: “Route for Transit Gateway”,
“Default”: “192.168.5.0/24”
},
“TransitGatewayRouteCIDR3”: {
“Type”: “String”,
“Description”: “Route for Transit Gateway”,
“Default”: “192.168.9.0/24”
},
“TransitGatewayRouteCIDR4”: {
“Type”: “String”,
“Description”: “Route for Transit Gateway”,
“Default”: “192.168.8.0/24”
},
“PrivateRoute1”: {
“Type”: “String”,
“Description”: “Route for the private subnets to communicate”,
“Default”: “192.168.7.0/24”
},
“PrivateRoute2”: {
“Type”: “String”,
“Description”: “Route for the pribate subnets to communicate with one another”,
“Default”: “192.168.5.0/24”
},
“RoutingDomainPrivateRoute”: {
“Type”: “String”,
“Description”: “Route for the private subnets to communicate”,
“Default”: “192.168.9.0/24”
},
“RoutingDomainPrivateRoute2”: {
“Type”: “String”,
“Description”: “Route for the pribate subnets to communicate with one another”,
“Default”: “192.168.8.0/24”
},
“RoutingDomainStackName”: {
“Type”: “String”,
“Description”: “Stack name for the template with VPC and other resources”,
“Default”: “RoutingDomain”
},
“TransitGatewayStackName” : {
“Type” : “String”,
“Description” : “Stack name for the template with the Transit Gateway”,
“Default” : “TransitGateway”
}
},
“Resources”: {
“PrivateRoute1A”: {
“Type”: “AWS::EC2::Route”,
“Properties”: {
“RouteTableId”: {
“Fn::ImportValue”: {
“Fn::Sub”: “${RoutingDomainStackName}-RouteTableID”
}
},
“DestinationCidrBlock”: {
“Ref”: “PrivateRoute1”
},
“GatewayId”: {
“Fn::ImportValue”: {
“Fn::Sub”: “${TransitGatewayStackName}-TransitGatewayID”
}
}
}
},
“PrivateRoute2A”: {
“Type”: “AWS::EC2::Route”,
“Properties”: {
“RouteTableId”: {
“Fn::ImportValue”: {
“Fn::Sub”: “${RoutingDomainStackName}-RouteTableIDB”
}
},
“DestinationCidrBlock”: {
“Ref”: “PrivateRoute2”
},
“GatewayId”: {
“Fn::ImportValue”: {
“Fn::Sub”: “${TransitGatewayStackName}-TransitGatewayID”
}
}
}
},
“RDPrivateRoute1”: {
“Type”: “AWS::EC2::Route”,
“Properties”: {
“RouteTableId”: {
“Fn::ImportValue”: {
“Fn::Sub”: “${RoutingDomainStackName}-RouteTableIDC”
}
},
“DestinationCidrBlock”: {
“Ref”: “RoutingDomainPrivateRoute”
},
“GatewayId”: {
“Fn::ImportValue”: {
“Fn::Sub”: “${TransitGatewayStackName}-TransitGatewayID”
}
}
}
},
“RDPrivateRoute2”: {
“Type”: “AWS::EC2::Route”,
“Properties”: {
“RouteTableId”: {
“Fn::ImportValue”: {
“Fn::Sub”: “${RoutingDomainStackName}-RouteTableIDD”
}
},
“DestinationCidrBlock”: {
“Ref”: “RoutingDomainPrivateRoute2”
},
“GatewayId”: {
“Fn::ImportValue”: {
“Fn::Sub”: “${TransitGatewayStackName}-TransitGatewayID”
}
}
}
},
“TransitGatewayRoute”: {
“Type”: “AWS::EC2::TransitGatewayRoute”,
“Properties”: {
“DestinationCidrBlock”: {
“Ref”: “TransitGatewayRouteCIDR”
},
“TransitGatewayAttachmentId”: {
“Fn::ImportValue”: {
“Fn::Sub”: “${RoutingDomainStackName}-TransitGatewayAttachmentID”
}
},
“TransitGatewayRouteTableId”: {
“Fn::ImportValue”: {
“Fn::Sub”: “${RoutingDomainStackName}-RouteTableID1”
}

            }
        }
    },
    "TransitGatewayRoute2": {
        "Type": "AWS::EC2::TransitGatewayRoute",
        "Properties": {
            "DestinationCidrBlock": {
                "Ref": "TransitGatewayRouteCIDR2"
            },
            "TransitGatewayAttachmentId": {
                "Fn::ImportValue": {
                    "Fn::Sub": "${RoutingDomainStackName}-TransitGatewayAttachmentIDb"
                }
            },
            "TransitGatewayRouteTableId": {
                "Fn::ImportValue": {
                    "Fn::Sub": "${RoutingDomainStackName}-RouteTableID2"
                }
            }
        }
    },
    "TransitGatewayRoute3": {
        "Type": "AWS::EC2::TransitGatewayRoute",
        "Properties": {
            "DestinationCidrBlock": {
                "Ref": "TransitGatewayRouteCIDR3"
            },
            "TransitGatewayAttachmentId": {
                "Fn::ImportValue": {
                    "Fn::Sub": "${RoutingDomainStackName}-TransitGatewayAttachmentIDc"
                }
            },
            "TransitGatewayRouteTableId": {
                "Fn::ImportValue": {
                    "Fn::Sub": "${RoutingDomainStackName}-RouteTableID1"
                }
            }
        }
    },
    "TransitGatewayRoute4": {
        "Type": "AWS::EC2::TransitGatewayRoute",
        "Properties": {
            "DestinationCidrBlock": {
                "Ref": "TransitGatewayRouteCIDR4"
            },
            "TransitGatewayAttachmentId": {
                "Fn::ImportValue": {
                    "Fn::Sub": "${RoutingDomainStackName}-TransitGatewayAttachmentIDd"
                }
            },
            "TransitGatewayRouteTableId": {
                "Fn::ImportValue": {
                    "Fn::Sub": "${RoutingDomainStackName}-RouteTableID2"
                }
            }
        }
    }
}